Mars Bar party

"... a national outcry in March 1994 after Leeds pupils of ten and eleven had 'Mars Bar parties' explained to them in response to a question, (using chocolate bars during oral sex) ... The lesson was by a nurse visiting from the Health Authority ... One mother said: 'When I heard about the lesson on affairs I was very upset, but my child was almost too embarrassed to talk to me about the lesson involving Mars bars.'"